4 3
This question is about carbon compounds. Compounds A, B, C and D are hydrocarbons. H
H
C
C
H
H
H
H
H
H
H
C
C
C
C
H
H
H
H
compound A
H
H
compound B
H
H
H
H
C
C
C
C
H
H
H
H
compound C
H
H
H
C
C
C
H
H
H
H
compound D
(a) Look at the displayed formulas of these compounds. Explain why they are all hydrocarbons. ................................................................................................................................................... ................................................................................................................................................... .............................................................................................................................................. [2] (b) Write down the molecular formula of compound B. answer ........................................................
[1]
(c) Look at the displayed formulas of compounds A and C. Compounds A and C are unsaturated. Explain why. ................................................................................................................................................... .............................................................................................................................................. [1]
Š OCR 2012